Features:

Easy to install,there is no need to install extra tools,it equips a hex key in each window locks,holding on the track by key control

Quality material:

Made of aluminum alloy, which is sturdy and strong, and there's a yellow plastic cover outside the key handle, can serve you for a long time.

Widely usage:

It can be easily applied to most environments.By keeping the windows partially open and closed,the burglar-proof and thieves can prevent children from falling and protect the safety of their families while improving air circulation.

Specifications:

Size: 6 x 2.4 x 2.4 cm/ 2.4 x 0.94 x 0.94 inch (LWH)

Material: aluminum alloy

Quantity: 4 sets

Package includes:

4 x Sliding window locks with key

Notice:

Multiple locks can be applied to heavy window or door together to increase safety.